f2fs: switch to ->iterate_shared()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index af81957..9e46151 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -902,7 +902,7 @@
 const struct file_operations f2fs_dir_operations = {
 	.llseek		= generic_file_llseek,
 	.read		= generic_read_dir,
-	.iterate	= f2fs_readdir,
+	.iterate_shared	= f2fs_readdir,
 	.fsync		= f2fs_sync_file,
 	.open		= f2fs_dir_open,
 	.unlocked_ioctl	= f2fs_ioctl,